40256121743280 has 120 divisors (see below), whose sum is σ = 135195812124048. Its totient is φ = 10734780261888.

The previous prime is 40256121743267. The next prime is 40256121743309. The reversal of 40256121743280 is 8234712165204.

40256121743280 is a `hidden beast` number, since 4 + 0 + 2 + 5 + 612 + 1 + 7 + 4 + 3 + 28 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44053099 + ... + 44957621.

Almost surely, 2^{40256121743280} is an apocalyptic number.

40256121743280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40256121743280 is an abundant number, since it is smaller than the sum of its proper divisors (94939690380768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40256121743280 is a wasteful number, since it uses less digits than its factorization.

40256121743280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966355 (or 966346 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 40256121743280 in words is "forty trillion, two hundred fifty-six billion, one hundred twenty-one million, seven hundred forty-three thousand, two hundred eighty".